can not get Group and Object in SCOM 2012 Performance widget.

Please provide the following information to the support engineer if you have to contact Microsoft Help and Support :

Microsoft.EnterpriseManagement.Presentation.DataAccess.DataAccessDataNotFoundException: Exception reading objects ---> Microsoft.EnterpriseManagement.Common.UnknownDatabaseException: The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query. If you believe you have received this message in error, contact Customer Support Services for more information.
   at Microsoft.EnterpriseManagement.Common.Internal.ServiceProxy.HandleFault(String methodName, Message message)
   at Microsoft.EnterpriseManagement.Common.Internal.EntityObjectsServiceProxy.GetManagedEntitiesByManagedEntityTypesAndCriteriaWithInstanceQueryOptions(IList`1 managedEntityTypeIds, IList`1 managedEntityBaseTypeIds, IList`1 criterias, String languageCode, InstanceQueryOptions instanceQueryOptions)
   at Microsoft.EnterpriseManagement.InstancesManagement.GetObjectsReaderInternal[T](ICollection`1 criteriaCollection, ObjectQueryOptions queryOptions)
   at Microsoft.EnterpriseManagement.Management.DataProviders.ManagedEntityProvider.GetManagedEntitiesByClass(ICollection`1 baseTypeNames, String criteriaString, List`1 valueDefinitions, List`1 sortValueDefinitions, Int32 maxEntities, String typePropertyName, String typeWithIconPropertyName, Boolean propertyCollectionRequested)
   --- End of inner exception stack trace ---
   at Microsoft.EnterpriseManagement.Presentation.DataAccess.DataProviderCommandMethodInvoker.Invoke()
   at Microsoft.EnterpriseManagement.Monitoring.DataProviders.RetryCommandExecutionStrategy.Invoke(IDataProviderCommandMethodInvoker invoker)
   at Microsoft.EnterpriseManagement.Presentation.DataAccess.DataProviderCommandMethod.Invoke(CoreDataGateway gateWay, DataCommand command)
   at Microsoft.EnterpriseManagement.Presentation.DataAccess.CoreDataGateway.ExecuteInternal[TResult](DataCommand command)
   at Microsoft.EnterpriseManagement.Presentation.DataAccess.CoreDataGateway.<ExecuteAsync>b__0[TResult](<>f__AnonymousType0`1 data)